aMagnetic control of spin reorientation and magnetodielectric effect below the spin compensation temperature in TmFeO3

Applied Physics Letters

Yue

Wang

et al. 2016

We studied the temperature dependent magnetic phase evolution in spin frustrated TbMnO3 affected by Fe doping via powder neutron diffraction. With the introduction of Fe (10% and 20%), the long range incommensurate magnetic orderings collapse. When the Fe content is increased to 30%, a long-range antiferromagnetic ordering develops, while a spin reorientation transition is found near 35 K from a canted G-type antiferromagnetic ordering to a collinear G-type antiferromagnetic ordering. This work demonstrates the complex magnetic interactions existing in transition metal oxides, which helps to understand the frustrated spin states in other similar systems and design magnetic materials as well.

mentioning

confidence: 98%

Collapse and reappearance of magnetic orderings in spin frustrated TbMnO3 induced by Fe substitution

Applied Physics Letters

Yue

Wang

et al. 2016

“…One can modify the magnetic transition and the dielectric property by an external magnetic field. [8][9][10][11] Magnetic competition in some rare earth manganites, such as orthorhombic TbMnO 3 (Ref. 7) and GdMnO 3 , 7 as well as DyMnO 3 , 7,12,13 could induce magnetic frustration and complex spin states.…”

Section: Andrqwlqxrxvo\ Wxqdeoh Pdjqhwlf Skdvh Wudqvlwlrqv Lq Wkh '\0q mentioning

confidence: 99%

Continuously tunable magnetic phase transitions in the DyMn1−xFexO3 system

Applied Physics Letters

Cheng

Zhao

et al. 2011

The structure and magnetic properties of perovskite DyMn1−xFexO3 samples have been studied. Static orbital orderings are expected to exist in samples with x ≤ 0.2 due to strong Jahn-Teller distortion, which become less stable as x increases and probably disappears in samples with x > 0.5. The antiferromagnetic transition temperature increases as x increases. At the composition x > 0.5, spin reorientation starts to appear. Meanwhile, the spin reorientation temperature and the antiferromagnetic Néel temperature gradually separate and widen the temperature range of the magnetic metastable state between these two transitions. The magnetic competition is discussed based on exchange interaction and Dzyaloshinsky-Moriya interaction.

“…[3][4][5][6] A great amount of work has been done to explore mutual control of these two degrees of freedoms, the so-called magnetoelectric (ME) coupling. [7][8][9] On the other hand, the dielectric property changes around the magnetic phase transition can offer a way to achieve magnetodielectric coupling, [10][11][12][13] which also provides an alternative way to achieve more operation of degrees of freedoms. Magnetic field induced dielectric constant changes are observed in metastable orthorhombic HoMnO 3 and YMnO 3 below their incommensurate antiferromagnetic (AFM) transition temperature of 42 K. 14 To achieve real applications based on spin related dielectric properties, it seems to be necessary to study their frequency and temperature dependence.…”

Section: Introductionmentioning

confidence: 99%

Dielectric relaxation in the DyMn1−xFexO3 system

Journal of Applied Physics

Cheng

Zhang

et al. 2012

The dielectric constant and loss of perovskite DyMn 1Àx Fe x O 3 samples show strong dispersion in various frequencies, which is indicative of relaxation. The activation energies were obtained through Arrhenius law fitting and range from 0.213 eV to 0.385 eV. The Fe content dependence of the characteristic frequency f 0 and the activation energy E a shows two transitions that are well consistent with the change in orbital ordering. Meanwhile, different magnetic orderings could affect the relaxation and induce the change in E a .